Existing HTML PHP input form----Needs Date Picker Added

Hello Experts

So what I have is an Existing Html Php Input form that looks like picture attached. I know the php is not up to date but the system is accessible from the internet and we will be getting a company to redo the whole PHP and SQL in a year or so.

I need a Date picker added to the form so the user can select a date from a calendar that will then go into my SQL database.

On line 55 of absent1.php when the user selects a name from the Absent Teacher that name is populated on all 9 input forms I will also need the date picker to do this as well if possible

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Yes, the column count here appears to be 7 and the values count appears to be 6. You may also want to learn about var_dump() which can give you a way to see exactly what is in the $_POST array.http://php.net/manual/en/function.var-dump.php